Floor-surfacing machine.



0. H. HOLDERER.

noon SURFACING MACHINE. APPLICATION FILED SEFT- I5, 1914.

Pmented June 15, 1915.,

2 SH EETSSHEET I.

on w. wommm. nooa SURFACINQ MACHINE. APPLICATION HLED SEPT. 16,1914.

Patentefi June 15, 1915.,

2 SHEETS-SHEET 2.

OTTO H, vBLOILIDIEXBER, OF DETROIT, MICHIGAN.

rnoon-sunrncme macnmn.

7 Specification of Letters Patent.

Patented une 15, 1915.

hpplieaxtionefiled September 16,1914. Serial No."861,957.

To all whom it may concern:

Be it .known that I, Orro H. HOLDERER a citizen of the United States. of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Floor- Surfacing Machines, of which the following is a specification, reference being had therein to the accompanying drawings. This invention relates to a floor surfacing machine, and the primary object of my invention is to provide a compact portable machine of the above 'type wherein simple and effective means are employed, as hereinafter set forth, for sand papering a surface and removing the dust or residue from the surface.

Another object of this invention is to provide' a machine of the above type embodying .a novel frame and adjustable roll bearing,

the frame having provision for adjusting the roll bearing, supporting a motor actuated suction fan, and a bag or reservoir to receive dust 'or residue from a floor, while the roll bearing has a connection with the suction fan that permits of the roll bearing being adjusted relative to the frame without impairing the'usefulness of the suction fan irrespective of the position of the roll bear- 1n A further object of this invention is to rovide a floor surfacing machine that can be operated upon the floor of comparatively small area and used.in limited 5 aces prohibitive to the average floor sur acing ma- 'chine.

In the general-make up of my machine, the parts are constructed with a view of reducing the cost of manufacture and at the same time retain features by which accuracy, durability, simplicity and ease of assembling are secured, and with such ends in view my invention consists in the novel and the roll bearing-thereof, Fig. 6 is an I enlarged cross sectional view of the sand paper roll, and Fig. 7 is a longitudinal sec-- tional view of the same.

In describin my invention by aid of the views above reerred to, I desire topoint out that I do not care to limit my invention to the precise construction and arrangement of parts shown, as said views are merely illustrative of an example whereby my invention may be applied in practice. The following description is therefore to be broadly construed as including substitute constructions and arrangements of parts which are the obvious equivalent of those to be hereinafter referred to.

In the drawings, 1 denotes an inclined base plate having the rear end thereof 'permanently connected to a base frame 2 and connected to said base frame are parallel uprights 3 having the upper ends thereof connected by a cross head? The forward end of the inclined base plate 1 has a central longitudinal bifurcation or slot 5 and at the side of said slot are vertical parallel bearings 6. Connected to the outer sides of said bearings are converging legs 7 that have the upper ends thereof connected to the uprights 3 by longitudinal parallel supports 8. The uprights 3, cross heads 4, legs 7 and supports 8 are preferably made of ordinary tubing or gas pipes, such structural material being easily obtained.

The forward end of the base late 1, at the sides thereof, hasdepending earings 9 for revoluble wheels 10, and cooperating with said wheels in supporting the base of the machine is a caster or swiveled wheel 11,

Pivotally mounted in the slot'or bifurca- V tion5 of the base plate 1 by a transverse pin 14: extending into the bearings 13' is the tongue 15 of a rectangular roll bearing frame 17, said frame being tiltable relative to the base plate 1. ,The frame 17 has a large rectangularopening 18 and the sides thereof are provided with bearings 19' for the driven shaft 20 of a roll 21. The poriphery of the roll 21 is covered with felt 22 or other yieldable material that forms a cushion for a strip of sandpaper 23 or other abrasive material connected to said roll.

To secure the strip of sand paper 23 to the roll, the felt 22 is cut or arranged to provide a diagonally disposed slot upon the periphery of the roll and it is into this slot that the ends of the strip of sand paper 23 are directed and secured to the body of the roll 21 by a retaining strip 24 and screws 25 or other fastening means as best shown in Fig. 6.

The upper part of the sand paper roll is inclosed by a casing 26 detachably mounted upon the frame 17 and the lower part of said roll is surrounded by a depending apron 27 that extends in close proximity to the surface over which the machine is operated.

One .end of the roll shaft 20 protrudes from the side of the frame 17 and is provided with a pulley 28 for a belt 29. The belt 29 is trained over a small pulley 30 mounted upon the armature shaft 31 of an electric motor 32- mounted upon the base plate 1. The electric motor 32 is of the ordinary and well known construction that can be operated from a suitable source of electrical energy, such as the ordinary electric lighting system of a building.

The armature shaft 31 of the motor 32 has another pulley 33 and engaging this pulley is a belt 34 trained over a pulley 35 forming part of a suction fan 36 mounted upon transverse bars 37 connectiiig the supports 8. The suction fan 36 is of the ordinary and well known type of blower and has an axial conduit 38 extending forwardly and downwardly to a bellows 39 or other flexible connection carried by a conduit 40 communicating with an opening 41 in the frame 17. The bellows 39 permits of the frame 17 being tilted without interfering with the connection between the conduits 40 and the conduits 38.

The fan 36 has an exhaust conduit 42 that extends rearwardly and upwardly to terminate in a depending spout 43. It is to this spout that the mouth of the bag or-re-' ceptacle 44 can be connected to collect dust or residue from the floor surface in the rear of the sand paper roll of the machine.

The uprights 3, contiguous to the cross head 4, have brackets or bearings 45 and 46 for a transverse rock shaft 47 that has one end thereof provided with a crank 48.

The shaft 47 adjacent to the bracket or bearing 45, has a flanged wheel or drum 49 to which is attached a strap 50. This strap has the opposite end thereof provided with a snap hook 51 or other means by'vwhich it can be detachably connected to the upper end of an arm 52, carried by the frame 17. It is through the medium of the rock or crank shaft 47, the strap 50 and the arm 52 that the frame 17 can be tilted and the forward end thereof raised or lowered relative to the surface over which the machine is moved. To hold the frame 17 in an elevated position and the surfacing roll thereof out of engagement with the floor, the side of the drum 49 is provided with a toothed or ratchet wheel 53 normally engaged by a dog 54, said dog preventing the strap 50 from unwinding from the drum 59.

Asthe machine is narrow and compact, it can be readily shifted upon a floor or surface of small area and practically the entire area of the floor or surface sand papered by the roll of the machine, and it is durin this operation that the roll bearing frame 14 can be raised and lowered and the floor properly surfaced. From time to time the strip of sand paper upon the roll can be reduced, and as the greater part of the machineis made of standard materials and devices, the cost of construction is reduced to a minimum.

What I claim is 1. A machine of the type described comprising a portable base plate, uprights carried thereby, a tiltable roll hearing at the forward end of said base plate, a driven sand papering roll carried by said bearing, a crank shaft supported by said uprights, means connected to said roll bearing and to said crank shaft whereby said roll bearing can be adjusted, and suction means connected to said roll bearing and adapted to remove dust from the rear side of said sand papering roll.

2. A machine of the type described comprising a portable base plate, uprights at the rear end thereof, supports above said base plate and connected to said uprights,

OTTO H. HOLDERER.

I lVitnesses:

G. E. MCGRANN, KARL H. BUTLER. 

